Change a function of vanilla command

Example :
When type /gamemode, It will not show a usage but it will show an ui or anything else

 

You can use

PHP:

public function onCommandProcess(PlayerCommandPreprocessEvent $event){

}


check if it's the command you want to change and cancel the event and perform the function you want

 

Ok, I'll try it

 

Or instead, you can register your own command to override the already existing command!

 

Like this ?

PHP:

       public function onCommandProcess(PlayerCommandPreprocessEvent $event){
           if($event->getCommand()->getName() == "gamemode"){
              $event->setCancelled(true);
           }
       }

 

I've register command but It still show usage

 

You must unregister the command first, iirc.

 

Ok